7,3x-6,2x+123,8-55,1 = 1,1x+68,7 = 1,1*0,3+68,7 = 0,33+68,7 = 69,03
1)=-3s-t+2s-8t=-s-9t
2)-3u+4v-6u+12v=-9u+16v
3)=-3p+3q-6p-10q=-9p-7q
4)=3n-3m-n-m=2n-4m
5)=6r+8s-9r-15s=-3r-7s
6)9x-3y+9x-3y=18c-6y
7)=-2r÷5s-10r+10s=-12r+15s8)
1) (4/5-11/15)*5/11= (12/15-11/15)*5/11=
2) 7/88*(8/21+8/7)=7/88*(8/21+24/21)=7/88*192/21=
3) 3/7*(1/4+7/12)=<span>3/7*(3/12+7/12)=</span>